M-2279D Instruction Book - Beckwith Electric Co., Inc.

M-2279D Instruction Book - Beckwith Electric Co., Inc.
Application Guide
M-2279D Adapter Panel
CONTROLS
Adapter Panel
M‑2279D
Adapts M‑2001 Series Digital Tapchanger Control to
Replace Pennsylvania Transformer and McGraw-Edison
LTC Transformer and Regulator Controls
•
Connects easily to the
M‑2001 Series Digital
Tapchanger Control using
mounting screws and
24-pin connector
•
Provides direct
mechanical replacement
of the old LTC transformer
or regulator control using
the same four mounting
studs, front door brace
and locking knob
•
Provides built-in CT
shorting protection when
the M‑2001 Series Digital
Tapchanger Control is
removed
•
Optional SCADA Cutout switch (for use with SCADA enabled
M-2001C controls) allows local blocking of SCADA commands
•
Optional SCAMP™ (SCADA Controlled Auto/Manual Pushbutton)
switch replaces AUTO/OFF/MANUAL toggle switch and allows
the Auto/Manual state of the adapter panel to be changed
by a SCADA command
•
Optional Voltage Reduction switch allows
Local Voltage Reduction 1 or 2 to be initiated
The M‑2279D is an adapter panel which, when combined with the M‑2001 Series Digital Tapchanger Control,
provides convenient direct replacement for the following Pennsylvania Transformer and McGraw-Edison LTC
transformer and regulator controls manufactured from 1963–1978: 550, 550A, 550B, 550C, 396B, 494B,
496B, 995 and 996.
Interface
External connections are made at two terminal blocks located on the rear panel of the M‑2279D, and at
two terminal blocks located on the printed circuit board. These terminal blocks provide access to auxiliary
functions, including self-test alarm, user-programmable alarm, auto disable and manual raise/lower. A fifth
terminal block provides for the addition of the M‑0329B LTC Backup Control. The four mounting studs, front
door brace and the front door locking knob must be saved from the existing control cabinet.
Features
Separate fuses for test terminal, voltage sensing and motor power are located on the front panel. Spare
fuses for each are in the fuse holder.
Binding posts on the front panel allow easy connections for test procedures.
RAISE/OFF/LOWER, AUTO/OFF/MANUAL and VOLTAGE SOURCE switches, DRAG HANDS RESET
button, and NEUTRAL LIGHT are standard.
NEUTRAL LIGHT will light to indicate that the regulator is in the neutral position, for those regulators equipped
with a circuit for this purpose.
The M-2279D also includes an Input Voltage Circuit Breaker and Backup Alarm Indicator.
Options
SCADA Cutout switch allows the local blocking of SCADA commands (for use with SCADA enabled M-2001C
controls). The SCADA Cutout switch must be used with a M-2001 Series Control with firmware version
D-0146V08.01.22 or later installed.
SCAMP™ (SCADA Controlled AUTO/MANUAL Pushbutton) switch allows the Auto/Manual state on the
adapter panel to be changed by a SCADA command. The SCAMP pushbutton switch must be used with a
M-2001 Series Control with firmware version D-0146V08.05.XX or later installed.
Voltage Reduction (VR1/OFF/VR2) switch allows Local Voltage Reduction 1 or 2 to be initiated.
–2–
Testing Specifications
High Voltage: All input and output terminals will withstand 1500 V ac rms to chassis or instrument ground for
one minute with a leakage current not to exceed 25 mA, for all terminals to ground. Input and output circuits
are electrically isolated from each other, from other circuits and from ground.
Surge Withstand Capability: All input and output circuits are protected against system transients. Units
pass all requirements of ANSI/IEEE C.37.90.1-1989 defining surge withstand capability.
Radiated Electromagnetic Withstand Capability: All units are protected against electromagnetic radiated
interference from portable communications transceivers.
Environmental
Temperature Range: Functionality is maintained from –40° to +85° C.
Humidity: Functionality is maintained under 95% relative humidity (non-condensing).
Fungus Resistance: A conformal printed circuit board coating inhibits fungus growth.
Physical
Size : 17" high x 15-1/16" wide x 9-7/8" deep (43.2 cm x 38.3 cm x 25.1 cm)
Approximate Weight: 11 lbs, 13 oz (5.4 kg)
Approximate Shipping Weight: 14 lbs, 13 oz (6.7 kg)
Approximate Weight with M‑0329B Option: 15 lbs, 13 oz (7.2 kg)
Approximate Weight with M‑2001 Series Digital Tapchanger Control: 15 lbs, 8 oz (7.0 kg)
Approximate Shipping Weight with M‑0329B Option: 18 lbs, 13 oz (8.5 kg)
Warranty
The M‑2279D Adapter Panel is covered by a five year warranty from date of shipment.
Specification is subject to change without notice.
–3–
© 2009 Beckwith Electric
Printed in U.S.A.
800-2279D-SP-00MC3 09/13
WARNING
DANGEROUS VOLTAGES, capable of causing death or serious
injury, are present on the external terminals and inside the equipment. Use extreme caution and follow all safety rules when handling, testing or adjusting the equipment. However, these internal
voltage levels are no greater than the voltages applied to the external terminals.
DANGER! HIGH VOLTAGE
–
This sign warns that the area is connected to a dangerous high voltage, and you
must never touch it.
PERSONNEL SAFETY PRECAUTIONS
The following general rules and other specific warnings throughout the manual must be followed during application,
test or repair of this equipment. Failure to do so will violate standards for safety in the design, manufacture, and intended
use of the product. Qualified personnel should be the only ones who operate and maintain this equipment. Beckwith
Electric Co., Inc. assumes no liability for the customer’s failure to comply with these requirements.
–
This sign means that you should refer to the corresponding section of the operation
manual for important information before proceeding.
Always Ground the Equipment
To avoid possible shock hazard, the chassis must be connected to an electrical ground. When servicing
equipment in a test area, the Protective Earth Terminal must be attached to a separate ground securely
by use of a tool, since it is not grounded by external connectors.
Do NOT operate in an explosive environment
Do not operate this equipment in the presence of flammable or explosive gases or fumes. To do so would
risk a possible fire or explosion.
Keep away from live circuits
Operating personnel must not remove the cover or expose the printed circuit board while power is applied. In no case may components be replaced with power applied. In some instances, dangerous voltages may exist even when power is disconnected. To avoid electrical shock, always disconnect power and
discharge circuits before working on the unit.
Exercise care during installation, operation, & maintenance procedures
The equipment described in this manual contains voltages high enough to cause serious injury or death.
Only qualified personnel should install, operate, test, and maintain this equipment. Be sure that all personnel safety procedures are carefully followed. Exercise due care when operating or servicing alone.
Do not modify equipment
Do not perform any unauthorized modifications on this instrument. Return of the unit to a Beckwith
Electric repair facility is preferred. If authorized modifications are to be attempted, be sure to follow
replacement procedures carefully to assure that safety features are maintained.
PRODUCT CAUTIONS
Before attempting any test, calibration, or maintenance procedure, personnel must be completely familiar
with the particular circuitry of this unit, and have an adequate understanding of field effect devices. If a
component is found to be defective, always follow replacement procedures carefully to that assure safety
features are maintained. Always replace components with those of equal or better quality as shown in the
Parts List of the Instruction Book.
Avoid static charge
This unit contains MOS circuitry, which can be damaged by improper test or rework procedures. Care
should be taken to avoid static charge on work surfaces and service personnel.
Use caution when measuring resistances
Any attempt to measure resistances between points on the printed circuit board, unless otherwise noted
in the Instruction Book, is likely to cause damage to the unit.
TABLE OF CONTENTS
M‑2279D Application Guide
M-2279D Adapter Panel
Application Guide
1.0Introduction............................................................................................................. 1
1.1Description.............................................................................................................. 1
Standard Features.................................................................................................. 1
Control Switches..................................................................................................... 1
Binding Posts.......................................................................................................... 2
Status Indicators..................................................................................................... 2
Optional Control Switches...................................................................................... 2
2.0Application.............................................................................................................. 2
External Connections............................................................................................. 2
Neutral Light Circuit................................................................................................ 2
Non-Sequential Operation...................................................................................... 3
Automatic Disable Input.......................................................................................... 3
Operations Counter Input....................................................................................... 3
Local/Remote Input................................................................................................ 3
Multi-Step Voltage Reduction ................................................................................ 3
Paralleling (N/A for BASE-R and BASE-RS Controls)............................................ 3
Disabling Auto/Off/Manual Toggle Switch Status Detection.................................... 3
Connections for Pennsylvania Transformer Controls.............................................. 4
McGraw Edison 240 Volt Motor Option................................................................... 4
Use of the M-0329 LTC Backup Control with the Tapchanger Control.................... 4
Table 1 Multi-Step Voltage Reduction External Connections .............................. 4
Figure 1 M-2001C and M‑2279D Adapter Panel with Standard
Auto/Off/Manual Toggle Switch and Optional Voltage Reduction
and SCADA Cutout Switches ................................................................. 5
Figure 2 M-2001C and M-2279D Adapter Panel with Optional SCAMP™
Auto/Manual, SCADA Cutout and Voltage Reduction Switches ............. 6
Figure 3 External Connections ............................................................................ 7
Figure 4 M-2279D Wiring Harness with Standard Auto/Off/Manual
Toggle Switch, Optional Voltage Reduction
and SCADA Cutout Switches ................................................................. 8
Figure 5 M-2279D Wiring Harness with Optional SCAMP Auto/Manual
Pushbutton Switch, Voltage Reduction and SCADA Cutout Switches ... 9
Figure 6 Tapchanger Control and LTC Backup Control Interconnections ......... 10
3.0Installation............................................................................................................ 11
Figure 7 Outline Dimensions ............................................................................. 11
Figure 8 M‑2279D Hole Drill Dimensions .......................................................... 12
3.1
Removal of the Pennsylvania Transformer Control .............................................. 13
3.2
Installation of the M‑2001 Series Digital Tapchanger Control .............................. 13
Figure 9 M‑2279D Adapter Panel Simplified Mechanical Drawing (top view) ... 13
Installation of the M‑2279D Adapter Panel........................................................... 13
3.3
i
M‑2279D Application Guide
4.0
M‑2001 Tapchanger Control Software Settings.................................................... 14
4.1
M‑0329B LTC Backup Control Settings................................................................ 14
5.0 Bench Test (M-2001 Connected to M-2279D)...................................................... 15
Test Equipment..................................................................................................... 15
Setup.................................................................................................................... 15
Table 2 Initial Settings ....................................................................................... 15
Procedure............................................................................................................. 15
Resistance............................................................................................................ 15
Figure 10 M‑2279D Test Procedure External Connection ................................. 16
Reactance............................................................................................................ 17
Paralleling............................................................................................................. 17
Voltage Source Switch.......................................................................................... 17
Drag Hands Reset................................................................................................ 17
Counter/Neutral Light/Tap Position....................................................................... 17
Block Raise/Block Lower/Dead Band................................................................... 17
5.1
M-2001 Checkout Procedure................................................................................ 18
Basic Operational Test.......................................................................................... 18
In-Service Test...................................................................................................... 18
5.2
5.3 M-2279D Checkout Procedure............................................................................. 18
Power.................................................................................................................... 18
Voltage Source Switch.......................................................................................... 19
© 2009 Beckwith Electric Co., Inc.
Printed in U.S.A.
ii
800-2279D-AG-01MC2 09/14
M-2279D Application Guide
The M-2279D Adapter Panel factory configuration
for AUTO/OFF/MANUAL switch status detection is
Enabled. The M-2279D Adapter Panel AUTO/OFF/
MANUAL switch status detection feature is available
to M-2001 series units that have Firmware Version D-0067V07.08.15 or later installed. See Section
2.0, Application, Disabling AUTO/OFF/MANUAL
Switch Status Detection, for the steps necessary to
disable the AUTO/OFF/MANUAL switch detection
function for M‑2001 series units with an earlier
firmware version.
1.0Introduction
The Beckwith Electric M‑2279D Adapter Panel, used
in conjunction with the M‑2001 Tapchanger Control,
uses modern electronic digital design and digital
processing circuitry to achieve an overall stability
and resolution unattainable with electromechanical
and analog design tapchanger controls. CMOS
semiconductors are used throughout the design.
 NOTE: The four mounting studs, front door brace
and locking knob must be saved from the
original control.
Control Switches
VOLTAGE SOURCE switch allows auto operation
of the control or manual operation from the panel
by using the RAISE/LOWER toggle switch. The
AUTO/OFF/MANUAL switch status may be read
by a M‑2001 series control with firmware version
D‑0067V07.08.15 or later installed.
1.1Description
Standard Features
The M‑2279D Adapter Panel, with the M‑2001
Series Digital Tapchanger Control, provides a
solid-state voltage control relay designed to directly
replace the following types of McGraw-Edison
(formerly Pennsylvania Transformer) controls that
were manufactured from 1963–1978: 550, 550A,
550B, 550C, 396B, 494B, 496B, 995 and 996. The
combination of the Tapchanger Control and Adapter
Panel includes the following features:
• Voltage waveform sampling and digital
processing circuitry ensure accurate rms
voltage sensing in the presence of distor‑
tion on the input voltage and current.
• Control accuracy is 0.3 % when tested in
accordance with the ANSI/IEEE C57.15.91999 standard over a temperature range
of –30° C to +65° C. The control accuracy
is 0.5 % when tested over the full op‑
erational temperature range of –40° C to
+85° C.
▲ CAUTION: Do not reverse the ground and
hot wires when connecting an external source. A
3 AG fuse (F2) is installed to protect the control
from damage if these connections are accidentally
reversed.
With the VOLTAGE SOURCE switch in the EXT
position, the sensing and motor power circuits are
connected to the External Power binding post on the
front panel. The unit can be tested using an external
120 V RMS source of proper polarity applied to these
terminals. Testing can be accomplished by adjusting
the amplitude of the external source.
The VOLTAGE SOURCE switch will disconnect
all power from the unit when selected to the EXT
position with no source connected to the front panel
voltage inputs.
DRAG HANDS RESET pushbutton switch resets
the tapchanger position indicator drag hands on the
regulator or LTC transformer.
• Input and output circuits are protected
against system transients. Units pass
all requirements of ANSI/IEEE
C37.90.1-1989, which defines surge
withstand capability. All input and output
terminals will withstand 1500 V ac rms to
chassis or instrument ground for one min‑
ute with a leakage current not to exceed
25 mA, for all terminals to ground. Input
and output circuits are electrically isolated
from each other, from other circuits and
from ground.
• Provision to add the M‑0329B LTC Backup
Control is included.
• Input Voltage Circuit Breaker for protection.
AUTO/OFF/MANUAL toggle switch allows manual
operation of the control. The AUTO/OFF/MANUAL
switch status may be read by a M-2001 series
control with firmware version D-0067V07.08.15 or
later installed.
When the M‑2001C Input Selection 1 screen in
the Configuration menu is set to Toggle Switch
Status Input, the seal-in input will operate as a
switch status input. All seal-in input functions will
be disabled. In this mode, the switch status on the
adapter panel can be read to determine if it is in Auto
or Manual. The status can be read through the sealin/switch status data point in the communications
protocols.
‑1-
M‑2279D Application Guide
Binding Posts
VOLTAGE IN binding posts on the front panel allow
application of a 120 V rms nominal voltage to the
unit for test procedures.
2.0Application
External Connections
Power and voltage sensing are obtained either from
a common source or from independent sources
having a nominal 120 V ac output. Normally, this is
line-to-neutral voltage, although line-to-line voltage
can also be used if recognition is made of any phase
shift between the voltage and current signals when
using line drop compensation.
MOTOR PWR IN binding posts on the front panel
allow application of a 120 or 240 V rms nominal
voltage to the unit for test procedures.
 NOTE: If the Motor Power Input configuration
has a different return from the 120 V
regulated Voltage Input, then Jumper
J12 on the printed circuit board must be
removed and TB1-16 should be used
for the separate motor power and return
connections (See Figure 4 or 5 for J12
location).
Load current must be reduced by an appropriate
auxiliary current transformer to 0.2 A “full scale”
before connecting to the M‑2279D current inputs.
The Beckwith Electric M‑0121 (5.0 A to 0.2 A)
or M‑0169A (5.0 A or 8.66 A to 0.2 A) Auxiliary
Current Transformer can be used for this purpose.
The M‑0121 can be used with Beckwith Electric
Tapchanger Controls when the only burden present
is the Line Drop Compensator circuit of the voltage
regulating relay. The M‑0169A is used in higher
burden circuits, such as are found in paralleling
schemes. Outputs of the auxiliary CTs are protected
against overvoltage. For further information,
obtain Beckwith Electric Application Note #17,
“Basic Considerations for the Application of LTC
Transformers and Associated Controls.”
METER OUT binding posts on the front panel
allow reading of the input voltage when used in
conjunction with the BIAS TEST VOLTAGE screen
of the M‑2001 Tapchanger Control.
Status Indicators
NEUTRAL LIGHT illuminates when the regulator is
in the neutral tap position.
The Adapter Panel includes three replaceable
fuses: Test Terminal (3 A), Voltage Sense (1 A), and
Motor Power (6 A). Spare fuses are provided in their
respective fuse holders.
The external connections for the M‑2279D are made
to terminal blocks TB3 and TB4. Auxiliary external
connections, if needed, are made to terminal blocks
TB1 and TB2 on the printed circuit board at the
base of the adapter panel. The wiring harness and
external connections for the M‑2279D are shown in
Figures 3, 4 and 5.
Backup Alarm Indicator - activates when power is
lost on the M-0329B backup control.
Optional Control Switches
VOLTAGE REDUCTION (VR1/OFF/VR2) switch
allows local voltage reduction 1 or 2 to be initiated.
Neutral Light Circuit
If the Neutral Light terminal TB1‑11 needs to be
grounded for the light to illuminate, set switch S1
(located in the right-hand corner of the adapter
panel printed circuit board) to the toggle up position.
If the Neutral Light terminal TB1‑11 needs to be
powered for the light to illuminate, set switch S1
(located in the right-hand corner of the adapter
panel printed circuit board Figures 4 and 5) to
the toggle down position (Hot). The operator may
simply experiment with this switch until the proper
position is found for the installation. Pennsylvania
Transformer controls do not make use of this feature.
SCADA CUTOUT (LOCAL/REMOTE) switch
allows the local blocking of SCADA commands.
The SCADA Cutout switch must be used with
a M-2001 Series Control with firmware version
D-0146V08.01.22 or later installed.
SCAMP™ (AUTO/MANUAL) pushbutton allows
the Auto/Manual state on the adapter panel
to be changed by a SCADA command. The
SCAMP pushbutton switch must be used with
a M-2001 Series Control with firmware version
D-0146V08.05.XX or later installed.
‑2-
M-2279D Application Guide
Non-Sequential Operation
The time delay of the M‑2279D can be interrupted
during tapchanger operation by momentarily
applying the “wetting” voltage of terminal TB4-7 to
TB4-6 (timer reset for non-sequential operation input)
through an external contact. This causes the output to
de-energize and reinitialize the time delay circuit
when the reset signal is removed. This function
can be used to cause the LTC transformer, if so
equipped, to wait for the unit to time out between
tapchanges.
Multi-Step Voltage Reduction
▲ CAUTION: Voltage applied through dry contacts
to actuate Voltage Reduction Steps 1, 2, and 3
must be nominal +12 V dc obtained from pin TB47 of the M‑2279D adapter panel. If an M­
‑0279
analog-version tapchanger control had previously
been installed, the wiring harness must be
reconfigured to remove the 120 V ac “wetting”
voltage obtained from TB1‑9. Carefully examine
the contacts of these functions to remove 120 V ac
wetting voltages.
▲ CAUTION: Voltage applied through dry contacts
to actuate non-sequential input must be nominal
+12 V dc obtained from pin TB4-7 of the M‑2279D
adapter panel. If an M­
‑ 0279 analog-version
tapchanger control had previously been installed,
the wiring harness must be reconfigured to remove
the 120 V ac “wetting” voltage obtained from TB1‑9.
Carefully examine the contacts of these functions
to remove 120 V ac wetting voltages.
On the M‑2279D, TB4-5 and TB4-4 on the printed
circuit board are used together to provide up to three
levels of voltage reduction. The external connections
to achieve these steps are shown in Table 1 and
Figure 3. Voltage reduction amounts are set within
the M‑2001 Tapchanger Control software.
Paralleling (N/A for BASE-R and BASE-RS
Controls)
See M-2001C Instruction Book, Section 4.9, Parallel
Operation.
Automatic Disable Input
To disable automatic operation of the M‑2279D,
remove Jumper #15 (See Figures 4 and 5, for
location) on the printed circuit board.
Disabling Auto/Off/Manual Toggle Switch Sta‑
tus Detection
The Auto/Off/Manual Toggle Switch status detection
feature is available on M-2001 Series Digital
Tapchanger Controls that have Firmware Version
D‑0067V07.08.15 or later installed. To disable the
Auto/Off/Manual Toggle Switch status detection
feature for earlier firmware versions, perform the
following:
If SCADA is used to enable and disable this function,
a contact rated at 6 A minimum can be connected
between the terminals.
Auto disable may also be accomplished by closing
a contact between TB4-6 and TB4-7.
Operations Counter Input
The M‑2279D counter circuit is wetted with
120 V ac from the tapchanger, as opposed to most
other Beckwith digital tapchanger controls which
increment the counter by momentarily connecting it
to neutral. If the operations counter fails to increment
properly, it may be necessary to introduce an
interposing relay with the necessary applied voltage.
Local/Remote Input
Removing Jumper #14 (See Figures 4 and 5, for
location) prohibits M‑2001 operation by disabling
the automatic raise and lower outputs and also by
disabling the M‑2279D Adapter Panel’s manual
RAISE/OFF/LOWER toggle switch. Removing this
jumper does not disable the SCADA-supplied motor
voltage input to the manual raise/manual lower
contacts on the adapter panel.
‑3-
1. Ensure that all power is removed from
the M-2279D Adapter Panel and M‑2001
control.
2. From the rear of the M-2279D Adapter
Panel locate (Figure 4) and remove the
wire connected to Terminal S3-4 on the
rear of the AUTO/OFF/MANUAL Toggle
switch.
3. Connect the wire removed in Step 2 to
Terminal S2-4 on the rear of the RAISE/
OFF/LOWER Toggle switch.
4. See M-2001 Instruction Book Section
6.1, External Connections, for information
regarding M-2001 settings to disable this
function.
M‑2279D Application Guide
Connections for Pennsylvania Transformer
Controls
In general, the tapchanger motor must be operated
from a different transformer than the VT used to
measure regulated voltage. If this is not done,
hunting at the upper band edge may result.
Use of the M-0329 LTC Backup Control with
the Tapchanger Control
The M‑0329 is a single‑phase, solid‑state backup
control that prevents a defective tapchanger control
from running the voltage outside the upper and lower
voltage limits. The Block Raise and Block Lower
voltage levels are set by accurately calibrated dials.
A typical connection for an M‑2279D is shown
in Figure 3. Connections are simplified and may
not show all functions required in a typical load
tapchanging transformer control scheme; for
example, seal‑in contacts, limit switches, etc.
The M‑0329 LTC Backup Control is connected as
a two terminal device to the voltage transformer.
Figure 6 shows the typical interconnection of the
two devices with motor auxiliary relays.
The M‑0329 Instruction Book is available on request
and gives added details. Please refer to the M‑0329
Instruction Book for complete ordering information.
McGraw Edison 240 Volt Motor Option
Some McGraw Edison transformers may have a 240
Volt powered motor option.
Some units have an additional terminal block and
240 V ac breaker mounted on the Time Delay Relay
Panel of the original control that is being replaced.
This terminal block may be labeled "MT-G" and the
breaker as "Motor ACB". If these items are found,
they should be relocated, as space permits, on the
abailable adjacent sheet metal.
The first four terminals are marked "L11", "L12",
"59" and "51". These are the four connections to the
"Motor ABC" circuit breaker and should be retained.
Other connections found on the terminal block
are "22" and "220", which pertain to functions
already on the M-2279D/M-2001C replacement
panel combination. Those connections may be
disconnected from the panel(s) being replaced.
Voltage Reduction Setpoint: Multiplier Range Apply "Wetting Voltage" from TB 4-7 to Terminal #
Voltage Reduction Setpoint #1: 0 to 10%
TB4-5
Voltage Reduction Setpoint #2: 0 to 10%
TB4-4
Voltage Reduction Setpoint #3: 0 to 10%
TB4-5 and TB4-4
Table 1 Multi-Step Voltage Reduction External Connections
‑4-
M-2279D Application Guide
Test
Terminal
Fuse 3 A
(Front Panel Inputs)
External
Meter
Power
Out
M-2001
TB1
Voltage Input
(Polarity)
1
1
Non-Sequential / Auto
Tapchange Inhibit Input
Load Current
(Return)
2
2
Voltage Reduction
Step #2 Input
Neutral
3
3
Circulating Current
(Return)
Load Current
(Polarity)
4
4
Circulating Current
(Polarity)
Circulating Current
(Polarity)
5
5
Tapchanger Raise
Output
Circulating Current
(Return)
6
6
Tapchanger Lower
Output
Tapchanger Raise
Output
7
7
Voltage Reduction
Step #1 Input
Motor Power Input
8
Voltage Reduction
Step #2 Input
Contact "Wetting"
Supply +12 V dc
Operation Counter
Input #1
Operation Counter
Input #2
J4
J5
INT
9
OFF
10
1
EXT
2
11
Motor Seal-In
Detector Input
13
Neutral Position
Detector #1
14
Neutral Position
Detector #2
15
Tapchanger Lower
Output
16
Non-Sequential
Operation/Auto T.C.
Inhibit Input
17
Voltage Reduction
Step #1 Input
18
Motor Seal-In
Disconnect Output
19
User-Programmable
Alarm
20
Self-Test Alarm
21
User-Programmable
Alarm
22
9
Voltage In
Fuse (1 A)
10
Regulated Voltage
(120 V ac)
11
Neutral Light
12
Drag Hands Reset
13
Operations
Counter Input
14
Line Current
(Polarity)
15
Line Current
(Return)
16
Motor Power
Return
Neutral
Light
OFF
3
J10
12
Neutral
Motor Power 120/
240 V ac Supply
INT
J9
2
8
Motor Power
Fuse (6 A)
EXT
3
Drag Hands
Reset
Up
1
(Netrual)
S1
Motor
Pwr In
Down
(Hot)
J12
R5
1 K Ohm
Manual
OFF
Manual
Raise
OFF
(Momentary)
Auto
Manual
TB2
OFF
Manual
Lower
Auto
17
Local/Remote
J14
18
19
Auto Disable
J15
Non-Interruptable
Power Supply Input
23
Self-Test Alarm
24
20
21
Manual Raise
22
Manual Lower
23
Motor Seal-In Input
24
Self-Test Alarm
(Return)
25
Self-Test Alarm
(Polarity)
26
User-Programmable
Alarm (Return)
27
User-Programmable
Alarm (Polarity)
28
+12 V dc Wetting Supply
Optional
Local
SCADA
Cutout
Remote
Optional
VR1
Voltage
Reduction
OFF
VR2
RT1
(.150 A)
8 WARNING: In no case should the line current circuit be interrupted with the regulator or transformer
energized. Do not remove auxiliary current transformers without shorting the current inputs. Death
or severe electrical shock can occur.
p CAUTION: Jumpers J9 and J10 must be positioned in the 2-3 orientation to avoid an overvoltage condition
on the counter input which will damage the M-2001 Series control. See Figures 1, 2, 4 and 5.
 NOTE: If the Motor Power Input configuration has a different return from the 120 V regulated Voltage
Input, then jumper J12 on the printed circuit board must be removed and TB1-16 should be used
for the separate motor return connections (See Figure 4 or 5 for J12 location).
Figure 1 M-2001C and M‑2279D Adapter Panel with Standard Auto/Off/Manual Toggle Switch and
Optional Voltage Reduction and SCADA Cutout Switches
‑5-
M‑2279D Application Guide
Test
Terminal
Fuse 3 A
(Front Panel Inputs)
External
Meter
Power
Out
M-2001
TB1
Voltage Input
(Polarity)
1
1
Non-Sequential / Auto
Tapchange Inhibit Input
Load Current
(Return)
2
2
Voltage Reduction
Step #2 Input
Neutral
3
3
Circulating Current
(Return)
Load Current
(Polarity)
4
4
Circulating Current
(Polarity)
Circulating Current
(Polarity)
5
5
Tapchanger Raise
Output
Circulating Current
(Return)
6
6
Tapchanger Lower
Output
Tapchanger Raise
Output
7
7
Voltage Reduction
Step #1 Input
Motor Power Input
8
Voltage Reduction
Step #2 Input
9
Contact "Wetting"
Supply +12 V dc
J4
J5
INT
OFF
10
1
11
Operation Counter
Input #2
12
Motor Seal-In
Detector Input
13
Neutral
9
Motor Power 120/
240 V ac Supply
Voltage In
Fuse (1 A)
10
Regulated Voltage
(120 V ac)
11
Neutral Light
12
Drag Hands Reset
13
Operations
Counter Input
14
Line Current
(Polarity)
15
Line Current
(Return)
16
Motor Power
Return
EXT
2
Operation Counter
Input #1
8
Motor Power
Fuse (6 A)
INT
J9
Neutral
Light
OFF
3
J10
2
EXT
3
Drag Hands
Reset
Up
1
(Netrual)
S1
Neutral Position
Detector #1
14
Neutral Position
Detector #2
15
Tapchanger Lower
Output
16
Non-Sequential
Operation/Auto T.C.
Inhibit Input
17
Voltage Reduction
Step #1 Input
18
Motor Seal-In
Disconnect Output
19
User-Programmable
Alarm
20
Self-Test Alarm
21
User-Programmable
Alarm
22
Motor
Pwr In
Down
(Hot)
J12
R5
1 K Ohm
SCAMP
Auto/Manual
Manual
Raise
OFF
(Momentary)
TB2
Optional
Manual
Lower
17
Local/Remote
J14
18
19
Auto Disable
J15
Non-Interruptable
Power Supply Input
23
Self-Test Alarm
24
20
21
Manual Raise
22
Manual Lower
23
Motor Seal-In Input
Optional
Local
SCADA
Cutout
Remote
24
25
Optional
VR1
Voltage
Reduction
OFF
26
User-Programmable
Alarm (Return)
27
User-Programmable
Alarm (Polarity)
28
+12 V dc
Wetting Supply
VR2
RT1
(.150 A)
8 WARNING: In no case should the line current circuit be interrupted with the regulator or
transformer energized. Do not remove auxiliary current transformers without shorting the
current inputs. Death or severe electrical shock can occur.
p CAUTION: Jumpers J9 and J10 must be positioned in the 2-3 orientation to avoid an overvoltage condition
on the counter input which will damage the M-2001 Series control. See Figures 1, 2, 4 and 5.
 NOTE: If the Motor Power Input configuration has a different return from the 120 V regulated Voltage
Input, then jumper J12 on the printed circuit board must be removed and TB1-16 should be used
for the separate motor return connections (See Figure 4 or 5 for J12 location).
Figure 2
M-2001C and M-2279D Adapter Panel with Optional SCAMP™ Auto/Manual,
SCADA Cutout and Voltage Reduction Switches
‑6-
M-2279D Application Guide
TB1
Non-Sequential / Auto
Tapchange Inhibit Input
1
Voltage Reduction
Step #2 Input
2
TB4
1
Circulating Current
(Return)
3
Circulating Current
(Polarity)
4
K1
2
Alarm Contacts from M-0329B,
when M-0329B is purchased with
unit
3
Tapchanger Raise
Output
5
Tapchanger Lower
Output
6
Voltage Reduction
Step #1 Input
7
Neutral
8
Motor Power 120/
240 V ac Supply
9
Regulated Voltage
(120 V ac)
10
Neutral Light
11
Drag Hands Reset
12
Operations
Counter Input
13
Line Current
(Polarity)
14
Line Current
(Return)
15
Motor Power
Return
16
4
Voltage Reduction
Step #2 Contact
5
Voltage Reduction
Step #1 Contact
6
Non-Sequential / Auto
Tapchange Inhibit Input
7
+12 V dc Wetting Supply
8
9
TB3
N/C
G
Motor Pwr In
(120 V)
52
29
Operations
Counter Switch
285
TB2
TB5
287
7
6
25
9
10
23
17
Local/Remote
18
Raise
Lower
Motor
L
19
CB 1
Auto Disable
To
Paralleling
Unit
G
R
Neutral
Neutral
(Motor Return)
20
Voltage In
(Reg 120 V)
10
Manual Raise
21
Manual Lower
22
Motor Seal-In Input
23
2A
N/C
CT1
Line
Current
CT
CT2
Self-Test Alarm
(Return)
24
Self-Test Alarm
(Polarity)
25
User-Programmable
Alarm (Return)
26
User-Programmable
Alarm (Polarity)
27
+12 V dc Wetting
Supply
28
CT Shorting
Switch
8 WARNING: Open CT secondary will result in high voltage at CT terminals. Death, severe injury
or damage to equipment can occur. Do not operate with CT secondary open. Short circuit or apply
burden at CT secondary during operation.
Figure 3 External Connections
‑7-
J14
J15
A
CB1
DS1
BP3
BP2
BP1
4
5
6
2
R5
R
R
R
4
5
6
S5
3
4
B
3
C
NO
NC
1
J8
J7
D2
1
17
10
2
11
3
9
1
3
2
1
23
J14
S4
B
2
1
B
5
S6
6
P-1970
BE# 450-00230
REV.
S5
1
2
34
1
4
2
5
4
8
5
7
6
6
7
5
1
J15
8
4
1
22
9
3
2
2
1
2
1
2
1
1
3
J4
J5
4
4
3
4
3
1
5
6
7
8
9
10
J6
RV3
U2
R7
P1
U1
1
2 J2
3
4
RV2
D8
6
RV1
D10
5
D9
F4
1
3
R6
17
C1
1
4
9
5
2
6
14 13 12 11 10
24 23 22 21 20 19 18
P21
2
3
4
J13
7
16 15
8
OUTLINE
M-2001C
1
J3
S2
D7
16
R8
S3
RV6
2
RV7
1
R3
F3
C3
F2
D1
H
N
RV5
R4
2
J2
1
S1
1
1
1
J9
J11
J10
2
C2
D11
1
J12
J1
TB1
C4
16
3
2
1
3
2
1
J10
J11
J9
Voltage Reduction Step #2 Input
Contact Wetting Supply +12 V dc
Non Sequential Operation/Auto
Tapchange Inhibit Input
Voltage Reduction Step #1 Input
Up (Neutral)
Down (Hot)
TB4
TB3
9
8
7
6
5
4
3
2
1
R1
+
1
+
‑8D4
Line Current (Polarity)
Line Current (Return)
Regulated Voltage (120 V ac)
Neutral
Tapchanger Lower Output
Tapchanger Raise Output
Circulating Current (Polarity)
Circulating Current (Return)
Operations Counter Input
Motor Power 120/240 V ac Supply
Neutral
285
6
5
4
3
25
23
K1
K1
TB5
15
14
12
11
10
9
7
6
4
3
2
1
CT2
CT1
10
G
7
8
1
2
M-0329B LTC
Backup Control
(Optional)
A
M‑2279D Application Guide
p CAUTION: Jumpers J9 and J10 must be positioned in the 2-3 orientation to avoid an overvoltage condition
on the counter input which will damage the M-2001 Series control. See Figures 1, 2, 4 and 5.
Figure 4 M-2279D Wiring Harness with Standard Auto/Off/Manual Toggle Switch,
Optional Voltage Reduction and SCADA Cutout Switches
287
29
52
G
D5
R5
RT1
J14
J15
A
CB1
DS1
BP3
BP2
BP1
4
5
2
R5
R
R
R
4
5
6
S5
4
B
3
S4
B
2
1
B
5
C
NO
NC
1
J8
J7
D2
1
3
9
1
23
TB2
J14
17
10
2
11
P-1970
BE# 450-00230
REV.
S5
1
2
2
3
S6
6
4
1
6
1
4
8
5
7
6
6
7
5
1
J15
8
4
1
22
9
3
2
2
1
2
1
2
1
1
3
J4
J5
4
4
3
4
3
1
5
6
7
8
9
10
J6
RV3
U2
R7
P1
U1
1
2 J2
3
4
RV2
D8
2
5
RV1
D10
6
D9
1
1
3
R6
17
C1
1
4
9
5
2
6
14 13 12 11 10
24 23 22 21 20 19 18
P21
2
3
4
J13
7
16 15
8
OUTLINE
M-2001C
1
J3
F4
D7
S2
R8
S6
RV6
2
RV7
1
R3
F3
C3
F2
D1
H
N
RV5
R4
2
J2
1
S1
1
1
1
J9
J11
J10
2
C2
D11
1
J12
J1
TB1
C4
16
3
2
1
3
2
1
J10
J11
J9
Voltage Reduction Step #2 Input
Contact Wetting Supply +12 V dc
Non Sequential Operation/Auto
Tapchange Inhibit Input
Voltage Reduction Step #1 Input
Up (Neutral)
Down (Hot)
TB4
TB3
9
8
7
6
5
4
3
2
1
R1
+
1
+
‑9D4
Line Current (Polarity)
Line Current (Return)
Regulated Voltage (120 V ac)
Neutral
Tapchanger Lower Output
Tapchanger Raise Output
Circulating Current (Polarity)
Circulating Current (Return)
Operations Counter Input
Motor Power 120/240 V ac Supply
Neutral
285
6
5
4
3
25
23
K1
K1
TB5
15
14
12
11
10
9
7
6
4
3
2
1
CT2
CT1
10
G
7
8
1
2
M-0329B LTC
Backup Control
(Optional)
A
M-2279D Application Guide
p CAUTION: Jumpers J9 and J10 must be positioned in the 2-3 orientation to avoid an overvoltage condition
on the counter input which will damage the M-2001 Series control. See Figures 1, 2, 4 and 5.
Figure 5 M-2279D Wiring Harness with Optional SCAMPTM Auto/Manual Pushbutton Switch, Voltage
Reduction and SCADA Cutout Switches
287
29
52
G
D5
R5
RT1
M‑2279D Application Guide


 ­
€ „
‚‹
­
 …
‚ƒ

ƒ†‡ƒƒ
ˆ‰ƒƒƒŠ
*
■ NOTE: If first customer protection is not required, delete these connections.
Figure 6 Tapchanger Control and LTC Backup Control Interconnections
‑10-
M-2279D Application Guide
3.0Installation
The M‑2279D consists of a swinging front door and
a side panel. The adapter panel mounts to the right
side of the control cabinet, using the same four
mounting studs used by the original control. Refer
to Figure 7 for outline dimensions; refer to Figure 8
for the hole drill dimensions of the M‑2279D's side
panel, if needed.
RAISE
AUTO
LOWER
MANUAL
OFF
OFF
Alternate Control Switch Configuration
FUSES
TEST TERMINAL
3 AMP
VOLTAGE
1 AMP
MOOR POWER
6 AMP
RAISE
AUTO
LOWER
MANUAL
OFF
OFF
VOLTAGE SCADA CUTOUT
REDUCTION REMOTE
VR1
OFF
VR2
LOCAL
INT
17.00
[43.2]
VOLTAGE
SOURCE
OFF
16.00
[40.6]
EXT
VOLTAGE IN
MOTOR PWR IN
METER OUT
M-2279D
TAPCHANGER CONTROL
B EC K W IT H
E L EC T R IC
DRAG HANDS
RESET
CO . I N C .
M a d e i n U .S .A .
C
9 0 B AC K UP
A L A RM
19 9 4 BEC KW IT H E L EC TR IC
NEUTRAL
LIGHT
VO LTAG E
B REA K E R
P US H O N
12.00
[30.5]
9.88
[25.1]
Inches
[centimeters]
15.28
[38.8]
Figure 7 Outline Dimensions
‑11-
M‑2279D Application Guide
9-7/8
[25.1]
6-3/8
[16.19]
17/32
[1.4]
12-3/4
[32.39]
Ø 1/2 [1.3] X 4
Mounting Holes
6-5/8
[16.8]
Inches (Centimeters)
Figure 8 M‑2279D Hole Drill Dimensions
‑12-
2-3/8
[6.0]
M-2279D Application Guide
3.1
Removal of the Pennsylvania
Transformer Control
3.3
Installation of the M‑2279D
Adapter Panel
1. Open cabinet door of the Pennsylvania
Transformer control.
 NOTE: Refer to Figure 9 for a simplified mechani‑
cal drawing of the M‑2279D, as viewed
from the top of the panel.
2.
Remove and save the locking knob from
the front door of the control and swing
the control front door outward. Remove
and save the front door brace.
3.
Disconnect the old control wir ing,
marking all wires for connections. Lift
the old control off of the mounting studs
and remove from the cabinet.
1.
Mount the M‑2279D Adapter Panel (with
the M‑2001 Tapchanger Control) onto the
mounting studs in the control cabinet. Leave
the panel swung outward so that the back
of the panel is accessible.
 NOTE: The four mounting studs, front door brace
and locking knob must be saved from the
original control.
p CAUTION: Jumpers J9 and J10 must be
positioned in the 2-3 orientation to avoid an
overvoltage condition on the counter input which
will damage the M-2001 Series control. See Figures
1, 2, 4 and 5.
3.2
Installation of the M‑2001
Series Digital Tapchanger
Control
Mount the M‑2001 Series Digital
Tapchanger Control to the back of the
M‑2279D Adapter Panel, and secure
with the four screws provided. The four
screws are shipped in a drawstring
bag, which is attached to the adapter panel.
2.
3. Reinstall the front door brace. Swing the
adapter panel front door closed and reinstall
the locking knob. Close cabinet door.
2. Insert the plug from the adapter panel printed
circuit board into the connector at the base
of the M‑2001.

1.
External connections are made to the
terminal blocks located on the side panel.
TB3 on the side panel is marked with the
original wire numbers and matches the
existing wiring harness. Refer to Figures
4, 5, and 6 for wiring connections.




Figure 9 M‑2279D Adapter Panel Simplified Mechanical Drawing (top view)
‑13-
M‑2279D Application Guide
4.0
M‑2001 Tapchanger Control
Software Settings
4.1
Adjust the BANDCENTER setting to the nominal
voltage desired. Adjust the BANDWIDTH setting
to the desired voltage band, centered on the
Bandcenter setpoint, that the voltage must exceed
before timer and subsequent tapchanger operation
occurs. Adjust the TIME DELAY setpoint to a
sufficient amount to eliminate excessive tapchanger
operations. The LINE DROP COMPENSATOR
should be set for the line impedance from
the transformer to the load center. For further
information, obtain Beckwith Electric Application
Note #17, “Basic Considerations for the Application
of LTC Transformers and Associated Controls.”
M‑0329B LTC Backup Control
Settings
The BANDCENTER and BANDWIDTH dials on
the M‑0329 LTC Backup Control should be set
so that the Block Lower limit is a small amount
(approximately 2 V) below the lower band limit of
the Tapchanger Control, and the Block Raise limit
is a similar amount above the upper limit if line drop
compensation is not used.
If line drop compensation is used, the M‑0329B
Block Raise limit should be set at the maximum
voltage desired at the transformer secondary under
full load.
The M‑0329B LTC Backup Control also includes
a deadband or runback function that regulates the
maximum voltage from the transformer. This “Lower”
function operates slightly above the Block Raise limit
and is connected to force the tapchanger to lower
the voltage if the upper limit is exceeded.
‑14-
M-2279D Application Guide
5.0
Bench Test (M-2001
Connected to M-2279D)
■ NOTE: This test assumes that the M‑2001
Procedure
1. Apply 120.0 V ac from power source.
Tapchanger Control is connected to the
M‑2279D Adapter Panel.
Test Equipment
• 0–200 mA current supply with phase angle
settings of 0° to +90°
2. The display of the M‑2001 will automatically
advance to the Local Voltage screen.
3. Increase voltage to 121.2. The LOWER
LED should illuminate.
• 90–145 V ac voltage source at 60 Hz
• High impedance true RMS voltmeter
with accuracy on ac of at least ±0.2% of
reading
4. Decrease voltage to 118.8. The RAISE
LED should illuminate.
5. Set input voltage to 120.0 V ac. Wait for
RAISE and LOWER LEDs to extinguish.
6. Increase voltage to 122.0 V ac, then start
timing when voltage passes 121.0 V.
7. Stop timing when the lamp connected to
the LOWER output illuminates (should be
approximately 5 seconds).
• Accurate Stop watch
Setup
1. Make the electrical connections as shown
in Figure 9.
■ NOTE: Refer to the M-2001C Instruction Book
Resistance
1. Apply 100.0 mA in-phase current to
TB1-14 (load current-polarity) and
TB1-15 (load current-return) of the adapter
panel. (Set S1 to LDC and S2 to I R.)
Appendix, Figures A-1 through A-13
for the locations of screens within the
software.
■ NOTE: There is a one second delay between
the out-of-band condition and panel LED
indication.
2. Enter initial M-2001 settings:
Initial Settings
Band Center
120.0 V
Bandwidth
2.0 V
2. Set LDC Resistance to 24.0 V. The RAISE
LED should illuminate.
3. Increase input voltage to 132.0 V ac. The
RAISE and LOWER LEDs should be
extinguished.
4. Set LDC Resistance to –24.0 V. The
LOWER LED should illuminate.
5. Decrease input voltage to 108.0 V ac.
Both RAISE and LOWER LEDs should
extinguish.
6. Set LDC Resistance to 0.0 V.
LDC Resistance 0.0 V
LDC Reactance
0.0 V
Paralleling
Circulating Current Method
Block Raise
135.0 V
Block Lower
105.0 V
Deadband
2.0 V
Timer
5.0 Seconds
Table 2 Initial Settings
‑15-
M‑2279D Application Guide
  


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‚‚ƒ„…
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Figure 10 M‑2279D Test Procedure External Connection
‑16-


M-2279D Application Guide
Reactance
1. Apply 100.0 mA 90° leading current
to TB3-CT2 (load current-polarity) and
TB3-CT1 (load current-return) of the
adapter panel.
2. Set S1 to LDC and S2 to I L.
3. Set LDC Reactance to 24.0 V. The LOWER
LED should illuminate.
4. Decrease input voltage to 108.0 V ac.
The RAISE and LOWER LEDs should be
extinguished.
5. Set LDC Reactance to –24.0 V. The RAISE
LED should illuminate.
6. Increase input voltage to 132.0 V ac.
Both RAISE and LOWER LEDs should
be extinguished.
Drag Hands Reset
1. Verify that the DRAG HAND RESET switch
works by connecting a lamp or ac relay
(drag hands reset) to TB3-G (neutral) of
the adapter panel. When the switch is
pressed, the connected indicator should
function. Pennsylvania Transformer controls
do not make use of this feature.
Counter/Neutral Light/Tap Position
1. Set the M‑2001 Tapchanger Control to
display the Operations Count screen.
2. Verify the counter operation by connecting
a switch between TB3-29 (operations
counter input) and TB3-10 (120 V ac) of
the adapter panel.
Paralleling
1. Apply 100.0 mA 90° leading current to
TB3-285 (circulating current-polarity) and
TB3-287 (circulating current-return) of the
adapter panel.
3. Lower the input voltage until the RAISE
LED lights. Allow the delay timer to time
out and then activate the switch between
TB3-29 (operations counter input) and
TB3-10 (120 V ac).
4. The tap position should change.
5. Jumper TB1-11 (neutral light) to TB3-G
(neutral).
2.The LOWER LED should illuminate.
6. Set the neutral light switch S1, located
on the adapter panel printed-circuit board
Figures 4 and 5, to the toggle down
position (Hot).
7. The neutral light on the adapter panel
should light and the tap position should
return to “0 Neutral.”
8. Remove the jumper.
7. Set LDC Reactance to 0.0 V.
3. Decrease voltage to 108.0 V ac. Both
RAISE and LOWER LEDs should be
extinguished.
4. Turn off current.
Voltage Source Switch
1.Set AUTO/OFF/MANUAL switch to OFF.
2.Set VOLTAGE SOURCE switch to EXT.
3. Verify that there is no manual Raise or
Lower output.
4. Attach a voltmeter to Meter Out terminals.
5. Verify that no voltage is present.
6. Apply 120 V ac to both the Voltage
In and Motor Pwr In binding posts
(Black-Neutral, Red-Hot).
7. Set the AUTO/OFF/MANUAL switch to
AUTO.
8. Verify normal raise and lower operation.
9. Return the VOLTAGE SOURCE switch
to INT.
Block Raise/Block Lower/Dead Band
1. Set Block Raise to 126.0 V.
2. Set Block Lower to 114.0 V.
3. Set the M‑2001 Tapchanger Control to
display the Bias Voltage screen.
4.Press Enter.
5. Increase voltage to 126.5 V. BR should
be displayed on the screen.
6. Increase voltage to 128.5 V. BR extinguishes
and FL is displayed on the screen.
7. Decrease voltage to 113.5 V. BL is
displayed on the screen.
—Bench Test Complete—
‑17-
M‑2279D Application Guide
5.1
M-2001 Checkout Procedure
5.3
■ NOTE: This test of the M‑2001 assumes that the
■ NOTE: All Beckwith Electric units are fully cali‑
unit remains connected to the M‑2279D
adapter panel.
brated at the factory. There is no need
to re-calibrate the units before initial
installation.
Basic Operational Test
1. Apply 120.0 V ac to TB3-52 (motor power)
and TB3-10 (regulated voltage) of the
adapter panel.
3. Verify local voltage y input voltage ±0.3 V.
4. Apply 100.0 mA in-phase current
to TB3-CT2 (load current-polarity) and
TB3-CT1 (load current-return) of the
adapter panel. Verify Control Load I y
100 mA and Power Factor y 1.0 ±0.02.
5. Apply 100.0 mA 90° leading current to
TB3-287 (circulating current-polarity) and
TB3-285 (circulating current-return) of the
adapter panel.
Set the AUTO/OFF/MANUAL SWITCH to OFF.
Inspect the MOTOR POWER and VOLTAGE fuses
to ensure they are correctly sized and have not
blown.
2. Connect neutral to TB3‑G (neutral).
POWER
1. Remove any external connection between
TB3-52 and TB3-10 which are located on
the adapter panel printed circuit board.
Also remove any voltage applied to TB352 externally. Using a voltmeter, make
sure that the voltage applied to TB3-10 is
nominal 120 V ac with respect to TB3-G
(neutral). Apply power to TB3-10 (hot) and
TB3-G (neutral).
6. Verify Control Circ I y 100.0 mA ±2 mA.
7. Verify Up, Down and Enter buttons work.
2. Connect a voltmeter to the METER OUT
test terminal on the front of the adapter
panel. 120 V ac should be indicated.
8 WARNING: Voltage applied at the METER
OUT test terminal may energize the regulator
or transformer to a high voltage through the
voltage transformer. Death or severe electrical
shock can occur. Do not connect any voltage
source at the METER OUT test terminal.
—Checkout Procedure Complete—
5.2
M-2279D Checkout Procedure
In-Service Test
1. Set the M‑2001 Tapchanger Control to
display the Bias Voltage screen.
▲ CAUTION: Do not reverse the ground and hot
wires when connecting an external source. A 3
AG fuse (F2) is installed to protect the relay from
damage if these connections are accidentally
reversed. Spare fuses are supplied inside the fuse
holders.
2.Press Enter.
3.Use Up and Down buttons to cause RAISE
and LOWER outputs.
—In-Service Test Complete—
RETURN UNIT TO DESIRED SETTINGS
‑18-
3. Apply motor power to TB3-52 (hot) and
TB3-8 (neutral). Set the AUTO/OFF/
MANUAL switch to MANUAL and using
the RAISE/OFF/LOWER switch, verify that
the motor runs in the proper direction when
this switch is in the RAISE and LOWER
positions.
M-2279D Application Guide
4. Set the AUTO/OFF/MANUAL SWITCH
to the AUTO position. Refer to the Field
Checkout Procedure as found in the
M‑2001 Status & Setpoint Review Guide
of the M‑2001 Tapchanger Control Instruc‑
tion Book for test/operation procedures.
VOLTAGE SOURCE SWITCH
The VOLTAGE SOURCE switch will disconnect all
power from the unit when in the EXT position with
no source connected to the front panel voltage and
motor power inputs.
5. As shown in Figure 8, temporarily place a
shorting device across the LDC-CT sec‑
ondary to short the line drop compensator
circuit, and place another shorting device
across TB3-285 and TB3-287 to short the
circulating current paralleling input, for the
load current check. Insert an ammeter
between the polarity input and TB3-CT2.
Open the load current shorting device and
with a known load on the transformer or
regulator, measure the current in the load
current circuit to ensure that this current
is correct for 0.2 A full load.
▲ CAUTION: Do not reverse the ground and hot
wires when connecting an external source. A 3 AG
(F2) is installed to protect the relay from damage if
these connections are accidentally reversed.
With the VOLTAGE SOURCE switch in the EXT
position, the sensing and motor power circuits are
connected to the VOLTAGE IN and MOTOR PWR
IN binding posts on the front panel. The unit can
be tested using an external 120 V rms source of
proper polarity applied to these terminals. Testing
can be accomplished by adjusting the amplitude of
the external source.
8 WARNING: In no case should the load
current circuit be interrupted with the regula‑
tor or transformer energized. Do not remove
auxiliary current transformers without shorting
the current inputs. Death or severe electrical
shock can occur.
6. Replace the shorting device across the
load current input and remove the am‑
meter. Reconnect polarity to the unit and
remove both jumpers. The LINE DROP
COMPENSATOR will be activated. Cor‑
rect CT polarity can be checked by simply
incorporating sufficient +R compensation.
The regulator should time out and run so
as to raise the output voltage.
‑19-
M‑2279D Application Guide
This Page Left Intentionally Blank
‑20-
Legal Information
Patent
The units described in this manual are covered by
U.S. Patents, with other patents pending.
Buyer shall hold harmless and indemnify the Seller,
its directors, officers, agents, and employees from
any and all costs and expense, damage or loss,
resulting from any alleged infringementof United
States Letters Patent or rights accruing thereform or
trademarks, whether federal, state, or common law,
arising from the Seller’s compliance with Buyer’s
designs, specifications, or instructions.
Warranty
Seller hereby warrants that the goods which are the
subject matter of this contract will be manufactured
in a good workmanlike manner and all materials
used herein will be new and reasonably suitable for
the equipment. Seller warrants that if, during a
period of five years from date of shipment of the
equipment, the equipment rendered shall be found
by the Buyer to be faulty or shall fail to peform in
accordance with Seller’s specifications of the
product, Seller shall at his expense correct the
same, provided, however, that Buyers shall ship the
equipment prepaid to Seller’s facility. The Seller’s
responsibility hereunder shall be limited to replacement value of the equipment furnished under this
contract.
Seller makes no warranties expressed or implied
other than those set out above. Seller specifically
excludes the implied warranties of merchantibility
and fitness for a particular purpose. There are no
warranties which extend beyond the description
contained herein. In no event shall Seller be liable for
consequential, exemplary, or punitive damages of
whatever nature.
Any equipment returned for repair must be sent
with transportation charges prepaid. The equipment
must remain the property of the Buyer. The aforementioned warranties are void if the value of the
unit is invoiced to the Seller at the time of return.
Indemnification
The Seller shall not be liable for any property
damages whatsoever or for any loss or damage
arising out of, connected with, or resulting from
this contract, or from the performance or breach
thereof, or from all services covered by or furnished
under this contract.
In no event shall the Seller be liable for special,
incidental, exemplary, or consequential damages,
including but not limited to, loss of profits or
revenue, loss of use of the equipment or any
associated equipment, cost of capital, cost of
purchased power, cost of substitute equipment,
facilities or services, downtime costs, or claims or
damages of customers or employees of the Buyer
for such damages, regardless of whether said claim
or damages is based on contract, warranty, tort
including negligence, or otherwise.
Under no circumstances shall the Seller be liable
for any personal injury whatsoever.
It is agreed that when the equipment furnished
hereunder are to be used or performed in connection with any nuclear installation, facility, or
activity, Seller shall have no liability for any
nuclear damage, personal injury, property damage,
or nuclear contamination to any property located at
or near the site of the nuclear facility. Buyer agrees
to indemnify and hold harmless the Seller against
any and all liability associated therewith whatsoever whether based on contract, tort, or otherwise.
Nuclear installation or facility means any nuclear
reactor and includes the site on which any of the
foregoing is located, all operations conducted on
such site, and all premises used for such operations.
Notice:
Any illustrations and descriptions by Beckwith
Electric Co., Inc. are for the sole purpose of
identification.
The drawings and/or specifications enclosed herein
are the proprietary property of Beckwith Electric
Co., Inc., and are issued in strict confidence;
therefore, shall not be used as a basis of reproduction of the apparatus described therein without
written permission of Beckwith Electric Co., Inc.
No illustration or description contained herein
shall be construed as an express warranty of
affirmation, promise, description, or sample, and
any and all such express warranties are specifically
excluded nor shall such illustration or description
imply a warranty that the product is merchantable
or fit for a particular purpose. There shall be no
warranties which extend beyond those contained in
the Beckwith Electric Co., Inc. terms of sale.
All rights reserved by Beckwith Electric Co., Inc. No reproduction may be made without prior written approval
of the Company.
This Page Left Intentionally Blank
BECKWITH ELECTRIC CO., INC.
6190 - 118th Avenue North • Largo, Florida 33773-3724 U.S.A.
PHONE (727) 544-2326 • FAX (727) 546-0121
marketing@beckwithelectric.com
www.beckwithelectric.com
ISO 9001:2008
© 2009 Beckwith Electric Co.
Printed in USA
800‑2279D-AG‑01MC2 09/14
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